Two mods that I made to my jeep recently that were free (with the right tools) were shortening the stock rock rails and trimming the body below the pinch weld for tire clearance and trimming the transmission skid plate to give the front drive shaft more room for articulation.

I posted some pics here....

https://www.jk-forum.com/forums/show...heel-Clearance


https://www.jk-forum.com/forums/show...e-Modification